KKM is nice, but on the dyno I have had similar gains (actually slightly better curves in most cases) w/ just the K&N drop-in clipped to the MAF (or cut the stock airbox down to just a ring that holds the filter on) and the sound is similar to the KKM. Not trying to knock the KKM, but a drop-in K&N is about 1/2 the price if not less.
